The following publications are possibly variants of this publication:
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- Letter from the Bulletin EditorKazuo Iwama. eatcs, 111, 2013. [doi]
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- Letter from the Bulletin EditorKazuo Iwama. eatcs, 120, 2016. [doi]
- Letter from the Bulletin EditorKazuo Iwama. eatcs, 115, 2015. [doi]
- Letter from the Bulletin EditorKazuo Iwama. eatcs, 124, 2018. [doi]
- Letter from the Bulletin EditorKazuo Iwama. eatcs, 123, 2017. [doi]
- Letter from the Bulletin EditorKazuo Iwama. eatcs, 113, 2014. [doi]